Method for reducing vibrations in rotating components

Abstract

Undesirable bending vibrations in at least one rotating component are reduced. An undesirable vibration is counteracted by the use of at least one actuator. A required sequence of signals to be applied to the actuator and/or an intensity level of those signals is based on an angle of rotation position of the rotating component. The rotating component is then subjected to a force based on the position of the angle of rotation.

1. A method for reducing bending vibrations in at least one rotating cylinder of a processing machine including:
 determining an angle of rotation position of said at least one rotating cylinder; 
 determining a course of said bending vibrations as a function of said angle of rotation position; 
 determining a course of counterforce to be impressed on said at least one rotating cylinder as a function of said angle of rotation position; 
 providing a control and memory device; 
 storing and predicting said course of said bending vibrations and said counterforce in said control and memory device; 
 providing a signal corresponding to said course of said determined counterforce; 
 periodically charging said at least one rotating cylinder with said signal; and 
 selecting a length of said period corresponding to one of a full revolution of said at least one rotating cylinder and a quotient of one revolution and a whole number. 
 
   
   
     2. The method of  claim 1  further including providing at least one actuator and using said at least one actuator for charging said at least one rotating cylinder with said counterforce. 
   
   
     3. The method of  claim 2  further including at least one journal for said at least one rotating cylinder and engaging said at least one actuator with said at least one journal. 
   
   
     4. The method of  claim 3  further including using said actuator for changing a position of an axial bending line of said journal. 
   
   
     5. The method of  claim 3  further including using said actuator and changing a position of said journal in a plane perpendicular to an axis of rotation of said rotating cylinder. 
   
   
     6. The method of  claim 2  further including providing said actuator as a piezo element. 
   
   
     7. The method of  claim 1  further including providing said counterforce as at least one discrete pulse. 
   
   
     8. The method of  claim 1  further including providing said counterforce as a function extending continuously within a period. 
   
   
     9. The method of  claim 1  further including relieving an existing pre-stress using said signal. 
   
   
     10. The method of  claim 1  further including correlating said counterforce directly with said angle of rotation position. 
   
   
     11. The method of  claim 1  further including providing a sensor and using said sensor for determining said course of said bending vibration. 
   
   
     12. A method for reducing bending vibrations in at least one rotating component of a printing press including:
 providing at least one journal for said at least one rotating component; 
 supporting said at least one journal in a bearing; 
 providing at least one actuator acting on said at least one journal; 
 providing signals for charging said actuator for counteracting said bending vibrations in said at least one rotating component; 
 predicting one of a sequence and a strength of said signals as a function of an angle of rotation position of said at least one rotating component; 
 charging said actuator with said sequence of said signals in a periodically repeating manner; and 
 selecting a period length of said sequence of said signals corresponding to one of a full revolution of said rotating component and a quotient of one revolution and a whole number.